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  • 1.
    Abbaraju, Nanda
    Jönköping University, School of Engineering.
    Sending and Receiving Data between Mobile and Data Logger2008Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • 2.
    Afzal, Mansoor
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Graph-Based Visualization of Ontology-Based Competence Profiles for Research Collaboration2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Information visualization can be valuable in a wide range of applications, it deals with abstract, non-spatial data and with the representation of data elements in a meaningful form irrespective of the size of the data, because sometimes visualization itself focuses on the certain key aspects of the data in the representation and thus it helps by providing ease for the goal oriented interpretation. Information visualization focuses on providing a spontaneous and deeper level of the understanding of the data.

    Research collaboration enhances sharing knowledge and also enhances an individual’s talent. New ideas are generated when knowledge is shared and transferred among each other. According to (He et al, 2009) Research collaboration has been considered as a phenomenon of growing importance for the researchers, also it should be encouraged and is considered to be a “good thing” among the researchers.

    The main purpose of this thesis work is to prepare a model for the competence profile visualization purpose. For this purpose the study of different visualization techniques that exist in the field of information visualization are discussed in this thesis work. The study and discussion about the visualization techniques motivates in selecting appropriate visualization techniques for the visualization of Ontology-based competence profiles for research collaboration purpose. A proof of concept is developed which shows how these visualization techniques are applied to visualize several components of competence profile.

  • 3. Ahlström, Johan
    et al.
    Nordström, Edward
    PSQS – Power Supply Quality Simulator2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    Kitron had wishes to be able to test and measure how disturbance affects their vehicle electronic units before they have been verified by SP Technical Research Institute of Sweden in Borås. This work started with the writing of a demand specification together with Kitron for a product PSQS, Power Supply Quality Simulator, which can generate some test pulses according to a standard for electronic units to Volvos vehicles. A design proposal was developed with the help the demand specification and was verified with the help of simulations. All electric schematics was designed with the guide of the design proposal. The pulses realized in the works of this thesis are those which Kitron experienced that they have a need to test in their own premises and which are possible to generate with the means available. All work took place at Kitron in Jönköping, the restriction of the work has been the cost of components not to be to high as well as the finished product shall be easily managed. This thesis work resulted in a unit which is possible to produce a number of disturbances on the voltage feed to a unit under test. Some pulses have not been completely correct according to Volvos standard. There are large possibilities to further develop PSQS to a unit that follows Volvos standard and even other vehicle producer’s standards.

  • 4.
    Alavizadeh, Zahra
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    PLC Controlled System for Local Humidity Management in Electronic Enclosures2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This master thesis is about investigation a power efficient anti-moisture device thatcan be implemented in electronic enclosures in severe climatic environments.First, some of the existing knowledge and previous works were introduced. Then arelevant theoretical background including three main approaches in humiditymanagement are described, comparison between the enclosure heaters and localheaters, some psychrometics concepts that have been used in the project, heattransfer fundamentals, environmental test basics, some humidity and temperaturesensing techniques, computational fluid dynamics, programmable logic controlfundamentals, comparison PLCs with microcontrollers was provided.A series experiments have been performed in order to find the power efficient andmost effective anti-moisture method. Based on the analysis of the experiment data,the local heater system has been designed. CFD assisted parametric study of thelocal heater has been performed in order to find the best feasible design includingthe size and location. The local heater has been built based on the results ofparametric study. Different materials have been tested in laboratory in order tofind the proper material for final prototype of heater. The implemented localheater has been integrated with programmable logic control device. The controlalgorithm has been developed for activation/deactivation of local heater. The logiccontrolled PCB local heater has been experimentally evaluated.In the end the results achieved from environmental test have been presented andanalyzed. Some conclusions on the results and also future work have been discussed.

  • 5.
    Andersson, Jonas
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Serialisering av API mellan PC och inbyggda system2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta examensarbete behandlar problemet med att testa inbyggda system i kontorsmiljö. För att göra detta och därigenom kunna göra anrop på det inbyggda systemets API, måste detta anrop skickas som ett seriellt datapaket över en seriell kommunikationslänk som TCP/IP.

    Detta möjliggjordes genom att först upprätta en kommunikationslänk med protokollet TCP/IP, där användningen av POSIX-sockets tillämpades. För att packa ner och packa upp funktionsanropen till seriell data implementerades ett protokoll som följdes när detta utfördes. Hantering av data i samband med överföring över TCP/IP sköttes av ett protokoll vid namn BGSFP, ett protokoll som bygger på det tidigare protokollet TSFP.

  • 6.
    Andreasson, Daniel
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering. Jönköping University, School of Engineering, JTH. Research area Embedded Systems.
    Slack-Time Aware Dynamic Routing Schemes for on-chip networks2007Licentiate thesis, monograph (Other academic)
    Abstract [en]

    Network-on-Chip (NoC) is a new on-chip communication paradigm for future IP-core based System-on-Chip (SoC), designed to remove a number of limitations of today’s on-chip interconnect solutions. A NoC interconnects cores by means of a packet switched micro-network, which improves scalability and reusability, resulting in a shorter time to market. A typical NoC will be running many applications concurrently, which results in shared network capacity between different kinds of traffic flows. Due to the diverse characteristic of applications, some traffic flows will require real-time communication guarantees while others are tolerant to even some loss of data. In order to provide different levels of Quality-of-Service (QoS) for traffic flows, the communication traffic is separated into different service classes. Traffic in NoC is typically classified into two service classes: the guaranteed throughput (GT) and the best-effort (BE) service class. The GT class offers strict QoS guarantees by setting up a virtual path with reserved bandwidth between the source (GT-producer) and destination (GT-consumer), called a GT-path. The BE class offers no strict QoS guarantees, but tries to efficiently use any network capacity which may become available from the GT traffic. The GT traffic may not fully utilize its bandwidth reservation if its communication volume varies, leading to time intervals where there is no GT traffic using the bandwidth reservation. These intervals are referred to as slack-time. If the slack can not be used this leads to unnecessarily reduced performance of BE traffic, since a part of the available network capacity becomes blocked. This thesis deals with methods to efficiently use the slack-time for BE traffic. The contributions include three new dynamic schemes for slack distribution in NoC. First, a scheme to inform the routers of a GT-path about available slack is evaluated. The GT-producer plans its traffic using a special playout buffer, and issues control packets containing the actual amount of slack-time available. The results show that this scheme leads to decreased latency, jitter and packet drops for BE traffic. Secondly, an extension to this scheme is evaluated, where slack is distributed among multiple GT-paths (slack distribution in space). This opens up the possibility to balance the QoS of BE traffic flows which overlap with the GT-paths. Thirdly, a scheme to distribute slack among the links of a GT-path (slack distribution in time) is proposed. In this approach, arriving GT-packets, at a certain router along the GT-path, can wait for a maximum defined amount of time. During this time, any waiting BE traffic in the buffers can be forwarded over the GT-path. The results confirm that this is especially important during high BE-traffic load, where this technique decreases the jitter of BE traffic considerably.

  • 7.
    Avdiu, Blerta
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Matching Feature Points in 3D World2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis work deals with the most actual topic in Computer Vision field which is scene understanding and this using matching of 3D feature point images. The objective is to make use of Saab’s latest breakthrough in extraction of 3D feature points, to identify the best alignment of at least two 3D feature point images.

    The thesis gives a theoretical overview of the latest algorithms used for feature detection, description and matching. The work continues with a brief description of the simultaneous localization and mapping (SLAM) technique, ending with a case study on evaluation of the newly developed software solution for SLAM, called slam6d.

    Slam6d is a tool that registers point clouds into a common coordinate system. It does an automatic high-accurate registration of the laser scans. In the case study the use of slam6d is extended in registering 3D feature point images extracted from a stereo camera and the results of registration are analyzed.

    In the case study we start with registration of one single 3D feature point image captured from stationary image sensor continuing with registration of multiple images following a trail.

    Finally the conclusion from the case study results is that slam6d can register non-laser scan extracted feature point images with high-accuracy in case of single image but it introduces some overlapping results in the case of multiple images following a trail.

  • 8.
    Axing, Erik
    Jönköping University, School of Engineering, JTH, Mechanical Engineering.
    Ljudkudde med stereoåtergivning2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This exam is done with the cooperation of Thorbjörn Birging. Birging does work with RFID[1] and he is also CEO at CombiQ at Science Park in Jönköping. For a long time he wanted to make an innovation to help people with sleeping problems, depression, anxiety and stress. The author’s role as an engineer student where to make his idea come true from scratch to prototype. Birging discovered after reading an article about sleeping problems that there were studies which showed that it is easier to sleep with a faint sound in the room so other people in the room does not get disturbed. Birging then focused to create a new pillow with sound integrated that should stand out from today’s pillows.

     The goal with this exam was to create a pillow with excellent stereo sound with amplifiers, which help peoples sleeping problems. Many people with these problems seek help at hospitals, but they only get prescriptions for tranquillizer and anti-depressive pills. Another issue with sleeping pills is the risk of getting addicted and long time use might disturb the normal sleeping function, which Anders Isaksson can confirm. Birging He runs a private clinic in Örebro and has helped Birging in a previous project. Birging has been in contact with Anders under this project and can confirm this statement.

     One way of relive sleeping problems might be to let the patient listen to calming music before the sleep period begins, which is the idea for this project. The author did an investigation to find any positives or negatives in today’s pillows with sound ability. Idea generating and require specification started soon after this with help of Birging. To know what the customers want with this new product a designbrief, function analytic and a QFD-matrix. The designbrief where made both verbal and visual to know how the product should look like as a customer. With the QFD-matrix we can rank the preferences with the competitors pillows in relation to Birgings requirements on the new prototype. The QFD doesn’t give any answers how the customer experience the product that the designbrief can accomplish. A prototype construction can only begin when the designbrief and function analytic are finished. The material selection was made by different test-phases with sound and comfort. Recticel AB in Gislaved has provided the author with different types of foam for the pillow and for this new product there is an interest to follow the development in the future. 

     The new developed product did manage to become better than the competitor’s pillows in many ways. The new product is pressure relieving, gives better sound which means the volume does not have to be high, and disturbance in the surroundings is minimized. The reason is that the material does spread the sound waves straight upwards the users ears. The pillows measurement are B50*H40*T5, that means you can have much space in bed and easy find a standard pillowcase. The user will get a comfortably sleeping period the entire night with this new product.

    [1] Radio Frequency IDentification

  • 9.
    Azizi, Nima
    et al.
    Jönköping University, School of Engineering, JTH. Research area Information Engineering. Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Taqi, Mohammed Aysar
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering. Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Applying Agile methodologies within the context of traditional project governance: - A study of the Volvo Group experience2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The nature of software development has changed in last decade. Waterfall or traditional command and control methods have been replaced by Agile methodologies. Agile came as a “solution” to the disadvantages of the waterfall methodology, but using Agile has its own challenges. Due to the attractive characteristics of Agile such as flexibility and short time-to-market, Agile development has been increasingly popular and the number of organisations which have started to move to Agile is growing every day. Implementing new methodologies in any organisation is always a big challenge, especially for large-scale organisations due to their complexity, many different interacting interfaces, strong organisational culture, etc.

    The nature of these challenges and obstacles changes from different perspectives within an organisation, and each of these perspectives needs to be studied and investigated to ensure a successful transition from traditional approaches to Agile. In this thesis we focus on the project manager and project governance perspectives. We aim to define the success and failure factors that play a key role in moving from traditional approaches to Agile approaches in large-scale organisations.

    To address these challenges we conducted literature reviews on the latest research in implementing Agile methodologies. To collect our data we used a combination of qualitative and quantitative research methods. We explored both IT project manager and Chief project manager opinions and experiences of the organisations by conducting interviews and questionnaires in our research.

    The results reveals the difficulty to find proper product owners in the Agile projects. It is challenging to set a product owner who has Agile knowledge and is expert in the project domain. Specialized training and coaching for product owners is mentioned as one of the solutions that could be provided for this challenge. “Distributed teams”, “Lack of focus on the business side” and “Weak coaching and support” are some of the other critical areas which have been presented by the participants in the interviews and survey in this study.

    The main conclusion is that in order to have a successful transition to Agile approaches, the Agile mind-set should be set in all different part in an organizations, not only the development side and also that everyone have to understand “Why” Agile is beneficial. Also the communication of lessons learnt and feedback should be strong and effective in order to avoid repetition of the same mistakes. In addition, specialized training and coaching for different roles within the period of the development is necessary to ensure the successful adoption of Agile.

  • 10.
    Belov, Vladimir
    et al.
    Ogarev Mordovia State University, Saransk, Russian Federation.
    Leisner, Peter
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing. RISE, Swedish Research Institute, Safety and Transport/Electronics, Borås, Sweden.
    Mannikoff, Anders
    Herrljunga Elektriska AB, Herrljunga, Sweden.
    Belov, Ilja
    Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
    Mathematical Model of Multi-Phase Power Converter for Parallel Computation2018In: International Journal of Emerging Electric Power Systems, ISSN 2194-5756, E-ISSN 1553-779X, Vol. 19, no 1, article id 20170114Article in journal (Refereed)
    Abstract [en]

    A mathematical model of a multi-phase power conversion system composed of modified bridge-elements (B-system) capable for parallel computation has been developed. Experimental validation on the example of a power system including a synchronous generator and an AC-DC rectifier has been performed. A mathematical algorithm for B-system assembly and steps to obtain mathematical model of the B-system have been developed. Integration of mathematical models of conversion system into the complete model of a multi-phase power system has been explained and evaluation of computational efficiency of parallel computation techniques for the developed model of an AC-DC-AC converter has been performed. The presented modelling method can be employed in the design phase of smart grids, for power quality and conducted emission analysis. 

  • 11.
    Bengtsson, Tomas
    et al.
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Kumar, Shashi
    Jönköping University, School of Engineering, JTH. Research area Robust Embedded Systems.
    A Survey of High Level Test Generation: Methodologies and Fault Models2004Report (Other academic)
    Abstract [en]

    Test of electronic circuits for fabrication fault is important if the circuits should have reasonable quality. To make the development of complex circuits manageable, methods and computer tools that work on a high level of abstraction are required. Development of test methodologies have however been left behind the increase of abstraction level used for the design. There is a risk that testing aspects become a bottle neck in the development of complex circuits if the test methods fail to cope up with the abstraction level for the design methods.

    System on Chips is often used to implement complex systems. The methods to make test for those circuits consists of three main parts. First part is the development of test procedures for the cores, which is preferably made at high level of abstraction. This area includes fault modeling and test pattern generation at behavior level of abstraction or higher as well as design of extra logic for insertion to facilitate testing. The second part requires development of methods to test the interconnections among cores.

    The third part is to develop a test access mechanism which can be used to test the cores and interconnections within a SoC. This survey is about development of fault models and test pattern for testing of cores at higher level of abstraction than logic level. A promising architecture for the interconnection is the Network on Chip architecture in which cores are interconnected through a network of packet switched switches. Testing of these switches will be identical to testing of a core.

    Models of physical and fabrication faults are needed at higher levels of abstraction in order to be able to develop test patterns from functional or behavioral description of cores. Researchers have experienced that the stuck-at fault model works quite well at logic level. But no such fault model has been discovered at behavioral or higher level which is universally accepted. Several behavior level fault models have been proposed. One of the proposed models is the variable bit stuck-at fault model. This model has been derived from the logic level stuck-at fault model but it does not give adequate coverage of physical faults. Physical faults inside components, like arithmetic and logic units, cannot be modeled in this way. With the methods proposed so far, knowledge of the logic level implementation of the unit is needed to model such faults. In this survey, we describe three proposed classes of fault models - fault models derived from logic level stuck-at faults, operator mutation faults and physically induced faults.

    Testing at higher level of abstraction has a lot in common with software testing. The pattern generation methods can be classified into two main categories, namely, code oriented methods and fault oriented methods. Methods can also be classified into methods that use fault simulation for test pattern generation or use algorithmic approach for test pattern generation. These two classification approaches are orthogonal leading to four different categories of methods. We have tried to put existing approaches in this category. We also survey the experimental setups developed and used by various research groups for carrying out research in high level testing. Some very interesting conclusions can be drawn about the efficacy of various categories of test pattern generation methodologies for testing various types of systems at behavioral level. An interesting conclusion is that code oriented methods are not very effective for testing data dominated circuits at behavioral level.

    Approaches followed by five different research groups working in the area of high level testing is also summarized and compared. We feel that the hierarchical test pattern generation method, which works simultaneously on several levels of abstraction, to generate test patterns is the most promising of these methods. We also feel that new fault models need to be developed to make testing at higher level of abstraction achieve adequate coverage of physical faults and become practically useful.

  • 12.
    Björk, Marie
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Testdriven utveckling – En utvärdering av Jordbruksverkets metod för systemutveckling2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 13.
    Boidi, Krishna Verma
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Design, Simulate and Prototype Data Decision System for the Smart Universal Gateway for e-HealthCare System: Master Thesis2011Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 14.
    Bratt, Carl
    et al.
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics.
    Carlbäck, Simon
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics.
    LoRa 433 MHz eller LoRa 868 MHz?: En jämförelse av paketförluster hos LoRa 433 MHz och LoRa 868 MHz2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 15.
    Brickarp, Erik
    et al.
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Josefsson, Oscar
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Kontrollbox för häftare A61022007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This report describes the construction and development of a control box, which is a tool for testing and verifying a certain model of Rapid’s built in staplers (model A6102). Basically the function of the control box is to interpret any errors that may occur in the stapler and to make it possible to test fire the stapler.

    The control box should be able to communicate with the stapler using a specialized communication protocol. The different data such as errors, firmware etc. from the stapler is presented in plain language on a display. Additional functions worth mentioning is the possibility to choose between several different firing modes and strengths of the stapler using two multiswitches.

    Our ambition with the control box was to create a construction that was suitable to build in small series, provide a good documentation and to write a program that would be easy to modify in case someone would like to add new functions in the future. Since we focused on making the box as easy as possible to assemble we have not prioritised to find the cheapest possible solution using cheap components. Instead we have chosen multifunctional components that individually can do as much of the work as possible such as the display and the microprocessor.

  • 16.
    Carlsson, Fredrik
    et al.
    Jönköping University, School of Engineering.
    Alexander, Fransson
    Jönköping University, School of Engineering.
    Smarta sensorer i bilindustrin: En undersökning av två sensorlösningar för växelspakar2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 17.
    Dahlberg, Christopher
    et al.
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Pehrsson, David
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Testsystem för utredning av integrerad styrning för RC-helikopter2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Abstract

    This report is about the creation of a test system for development of a control system for a off the shelf RC-helicopter, which can be bought for about two thousand SEK. The test system consists of both electronics for controlling the helicopter and mechanical constrainer. The constrainer is used for mounting the helicopter so that it won´t crash.A circuit board including processor and sensors was manufactured. This was used for doing test of the different control algorithms. In this way were we able to analyze the quality of the sensors chosen, and what other sensors that could contribute to the control of the system.Basic helicopter control have been studied and presented in the report. Also different kinds of regulation algorithm were presented. These have also been implemented and tested in the test system.Experiments were made to identify how signals in the radio controller were mixed and translated before they were sent to the receiver, to be used to control the helicopter. This could later be used to translate the control signal from the regulators.Demonstrations, with the help of the test system, revealed the pros and cons of the different sensors and other hardware. Different regulation techniques were also tested and analyzed.

  • 18.
    Dávila García, Francisco Javier
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    A power efficient active RFID communication Protocol2007Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
    Abstract [en]

    Active Radio Frequency Identification (Active RFID) is a wireless automated technology used to identify, track, process and share information about an object or from the environment. As microcontrollers and radio frequency transponders are smaller in size, more power efficient, and less expensive, this technology is growing and starting to expand significantly through all the industries. The main purpose of with this project was to reduce the ower consumption of the active tags. This master thesis presents a functional TDMA based protocol which was designed and developed for a specific tracking system application.

  • 19.
    Ferwerda, Bruce
    et al.
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics.
    Graus, Mark
    Maastricht University.
    Predicting Musical Sophistication from Music Listening Behaviors: A Preliminary Study2018Conference paper (Refereed)
    Abstract [en]

    Psychological models are increasingly being used to explain online behavioral traces. Aside from the commonly used personality traits as a general user model, more domain dependent models are gaining attention. The use of domain dependent psychological models allows for more fine-grained identification of behaviors and provide a deeper understanding behind the occurrence of those behaviors. Understanding behaviors based on psychological models can provide an advantage over data-driven approaches. For example, relying on psychological models allow for ways to personalize when data is scarce. In this preliminary work we look at the relation between users' musical sophistication and their online music listening behaviors and to what extent we can successfully predict musical sophistication. An analysis of data from a study with 61 participants shows that listening behaviors can successfully be used to infer users' musical sophistication.

  • 20.
    Folkesson, Marcus
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Reducering av effektförbrukning i inbyggda system med Linux2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Linux is a growing operating system in embedded systems. Today, Linux is not only in heavy servers but also in cell phones, PDAs, cameras and other devices running on battery power. While current technology is more energy efficient, more and more technologies are implemented into a single unit resulting in an overall increase of power consumption.

    Low power consumption is an increasingly important feature of a system today. Lower power consumption means lower costs, less environmental impact, and longer life for applications that runs on batteries.

    This work compiles methods to reduce power consumption of Linux systems. The work includes examining whether the available opportunities are platform-specific or of a more general nature. The evaluations of methods for efficacy, has been performed on three different platforms. Testing consists of different types of stress tests and turning the units on-and-off.

    The results show that many of the features for power management that are available in a Linux system are of a general nature and that the Linux kernel has good support for implementation of new power management functions. Through the power reduction tests it has been proven that reducing the frequency of the processor and bit rate of the Ethernet controller provides the highest efficiency gain at different load levels.

    This work also investigates whether implementation of dynamic frequency scaling on a new processor is a complex task or not. Implementations in the Linux kernel provide general code that means that only the processor-specific part needs to be implemented. The implementation was carried out without major complications.

  • 21.
    Gaeta, Matteo
    et al.
    University of Salerno.
    Marzano, Antonio
    University of Salerno.
    Miranda, Sergio
    University of Madrid.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    A Smart Competence-Based Prioritisation for Learning Programmes Systems2015In: 2015 International Conference on Intelligent Networking and Collaborative Systems, INCoS 2015, Taipei, Taiwan, September 2-4, 2015., IEEE Press, 2015, p. 435-439Conference paper (Refereed)
    Abstract [en]

    In public and local administration contexts, the organizational structures depend on bureaucratic aspects. This often implies that people are engaged in offices and their allocation come from emergencies and political factors instead of rational motivations related to knowledge, competences and profiles. In most cases, such situations become gangrenous and generate dissatisfaction and low productivity. The objective of our work is applying competence management, skill gap analysis and a study of the existing organizational structures to point out the functional unit with the most critical situation in terms of allocated employees and to suggest a solution according to the complex laws, internal regulation for the staff management and trade-union influences. The proposed approach identifies the real gaps that create inefficiencies and suggests the people to engage in learning programs by focusing exactly on what the organizations need with respect to what the employees have. It happens by elaborating a priority scale on the base of existing hierarchies, relationships, logistic constraints and other aspects with the aim, above all, of enhancing the identified unit and the local administration itself.

  • 22. George, Appu
    et al.
    David, Soney John
    AN INVESTIGATION INTO SOFTWARE DEVELOPMENT PRACTICES IN SWEDISH START-UPS2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 23.
    Gil, Juan
    et al.
    Jönköping University, School of Engineering.
    Jimenez, Naybi
    Jönköping University, School of Engineering.
    Molina, Ricardo
    Jönköping University, School of Engineering.
    Development and Construction of a Portable Music Composing Device2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper explains the process and the result of developing a device to compose musical pieces that is both portable and intuitive to use. The project focuses on the use of a PIC microcontroller for a wide variety of functions such as generating musical notes, controlling a graphical LCD, a touchpad, saving and loading data with a non-volatile EEPROM memory and communicating the device with a PC through the serial port. This report also contains the design for the circuit that houses the PIC and additional electronic components, and an explanation of the computer program we made that receives the data from the device and translates it to the appropriate format used with open-source software Lilypond.

    This thesis intends to create a helpful tool for every kind of musician and be an interesting and fun project that inspires other engineers to build their own devices.

     

  • 24.
    Grabis, Janis
    et al.
    Riga Technical University.
    Sandkuhl, KurtJönköping University, School of Engineering, JTH. Research area Information Engineering.
    Proceedings of the CAiSE 2015 Forum at the 27th International Conference on Advanced Information Systems Engineering co-located with 27th International Conference on Advanced Information Systems Engineering (CAiSE 2015), Stockholm, Sweden, June 10th, 20152015Conference proceedings (editor) (Other academic)
  • 25.
    Grabis, Janis
    et al.
    Riga Technical University.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Stamer, Dirk
    University of Rostock.
    Collaborative Teaching of ERP Systems in International Context Enterprise Information Systems2015In: ICEIS 2015 - Proceedings of the 17th International Conference on Enterprise Information Systems, Volume 1, Barcelona, Spain, 27-30 April, 2015., SciTePress, 2015, p. 196-205Conference paper (Refereed)
    Abstract [en]

    ERP systems are characterized by a high degree of complexity what is challenging to replicate in the classroom environment. However, there is a strong industry demand for students having ERP training during their studies at universities. This paper reports a joint effort of University of Rostock and Riga Technical University to enhance introductory ERP training by introducing an internationalization dimension in the standard curriculum. Both universities collaborated to develop an international ERP case study as an extension of the SAP ERP Global Bikes Incorporated case study. The training approach, study materials and appropriate technical environment have been developed. The international ERP case study is performed at both universities where students work collaboratively on running business processes in the SAP ERP system. Students’ teams at each university are responsible for business process activities assigned to them and they are jointly responsible for completing the process. The case study execution observations and students’ evaluations suggest that the international ERP provides a good insight on the real-life challenges associated in using the ERP systems in the international context.

  • 26.
    Grabis, Janis
    et al.
    Institute of Information Technology, Riga Technical University, Latvia.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics. Jönköping University, School of Engineering, JTH. Research area Information Engineering. Institute of Computer Science, University of Rostock, Germany.
    Stamer, Dirk
    Institute of Computer Science, University of Rostock, Germany.
    International ERP teaching case: Design and experiences2015In: Enterprise information systems: 17th International Conference, ICEIS 2015, Barcelona, Spain, April 27-30, 2015, revised selected papers, 2015, p. 131-150Conference paper (Refereed)
    Abstract [en]

    Enterprise Resource Planning (ERP) systems are among the most widely used large-scale information systems. Industry and students in IT-related subjects expect that ERP training is part of the studies during university education. However, traditional teaching materials use somewhat simplified multi-role and cross-organizational processes which do not fully reflect reality in enterprises, for example with respect to role-based permissions or coordination challenges in international organizations. This paper reports on an attempt to extend the SAP ERP GBI case study towards an international dimension. For this purpose an international ERP case study was developed which is presented in the paper with its didactical approach, the technical way how to implement the case study in SAP, and the teaching environment. The work is a joint effort by University of Rostock and Riga Technical University which has a focus on enhancing introductory ERP training for study programs in information technology and business informatics. One of the key features of the international ERP case study is that students of both universities work collaboratively on running business processes in the SAP ERP system. Evaluations suggest that the students appreciate the case study as suitable means to get an insight in real-life challenges connected to ERP use in an international context.

  • 27.
    Gustafsson, Carl Johan
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    VHDL-implementering av drivkrets för en alfanumerisk display2008Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Everything started when I got a task from Euromaint Industry in Skövde, Sweden, to develop an alphanumerical display that could replace an old one, which was sold out. I got a task to choose a modern, suitable, graphical display and develop an interface between the new display and the industrial machine, which the old one was connected to. I have searched for a display at some suppliers of electronic components and I have found a TFT-display from the Japanese company Kyocera. The display had an interface similar to VGA so I had to study VGA to see how it works. Then I realized that I needed a faster circuit than a microcontroller. Then I chose a programmable logic circuit, an FPGA, to control the VGA-sweep. Today the FPGA-circuit controls the whole system.

  • 28.
    Gustafsson, Stefan
    et al.
    Linnéuniversitetet.
    Biro, Thomas
    Jönköping University, School of Engineering, JTH, Physics.
    Cinar, Gökan
    Linnéuniversitetet.
    Gustafsson, Mats
    Lunds universitet.
    Karlsson, A.
    Lunds universitet.
    Nilsson, Börje
    Linnéuniversitetet.
    Nordebo, Sven
    Linnéuniversitetet.
    Sjöberg, Mats
    ABB.
    Electromagnetic dispersion modeling and measurements for HVDC power cables2014In: IEEE Transactions on Power Delivery, ISSN 0885-8977, E-ISSN 1937-4208, Vol. 29, no 6, p. 2439-2447Article in journal (Refereed)
    Abstract [en]

    This paper provides a general framework for electromagnetic (EM) modeling, sensitivity analysis, computation, and measurements regarding the wave propagation characteristics of high-voltage direct-current (HVDC) power cables. The modeling is motivated by the potential use with transient analysis, partial-discharge measurements, fault localization and monitoring, and is focused on very long (10 km or more) HVDC power cables with transients propagating in the low-frequency regime of about 0-100 kHz. An exact dispersion relation is formulated together with a discussion on practical aspects regarding the computation of the propagation constant. Experimental time-domain measurement data from an 80-km-long HVDC power cable are used to validate the electromagnetic model, and a mismatch calibration procedure is devised to account for the connection between the measurement equipment and the cable. Quantitative sensitivity analysis is devised to study the impact of parameter uncertainty on wave propagation characteristics. The sensitivity analysis can be used to study how material choices affect the propagation characteristics, and to indicate which material parameters need to be identified accurately in order to achieve accurate fault localization. The analysis shows that the sensitivity of the propagation constant due to a change in the conductivity in the three metallic layers (the inner conductor, the intermediate lead shield, and the outer steel armor) is comparable to the sensitivity with respect to the permittivity of the insulating layer. Hence, proper modeling of the EM fields inside the metallic layers is crucial in the low-frequency regime of 0-100 kHz.

  • 29.
    Gutschmidt, Anne
    et al.
    University of Rostock.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Multi-Touch-Tisch oder Plastikfolie? Design einer Studie zum Vergleich von Medien in der Modellierung2015In: 45. Jahrestagung der Gesellschaft für Informatik, Informatik 2015, Informatik, Energie und Umwelt, Cottbus, Deutschland, 28. September - 2. Oktober 2015., Bonn: Gesellschaft für Informatik, 2015, Vol. 246, p. 947-961Conference paper (Refereed)
  • 30.
    Göbel, Hannes
    et al.
    University of Borås.
    Cronholm, Stefan
    University of Borås.
    Seigerroth, Ulf
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Towards an agile method for ITSM self-assessment: A Design Science Research Approach2013In: Proceedings of ICMLG 2013 The International Conference on Management, Leadership and Governance, 2013Conference paper (Refereed)
    Abstract [en]

    — IT Service Management (ITSM) is an expensive field where small and medium sized enterprises (SMEs) need to become more efficient in their ITSM related work in order to cut costs and improve quality. The focus of this paper is to suggest a solution to the scarcity of process improvement methods dedicated to ITSM-processes in SMEs. The solution consists of an agile self-assessment method designed and evaluated in accordance with Design Science Research. The aim of the method is to support SMEs in their attempt to evaluate and improve their quality of ITSM processes. The findings show that the method creates opportunities for organizations to improve their ITSM processes. The method can be used to identify process gaps in comparison to standards for ITSM. It can also be used for benchmarking purposes within an organization as well as it can guide an organization’s improvement efforts. The method also depicts a standard that is easy for SMEs to understand and to use as guidance (with ITSM specific examples). Finally, the method enables SMEs to implement standards for ITSM in a resource-efficient way. Based on empirical evidence from applying the method the conclusion is that the method is useful for the intended target group and that the method agrees well with theories within the field.

  • 31.
    Hellström, Christina
    et al.
    Jönköping University, School of Engineering, JTH, Lighting design.
    Vitulic, Lina
    Jönköping University, School of Engineering, JTH, Lighting design.
    Belysningsplanering i komplex industrimiljö2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today, Sweden employs about 930,000 people in industry. In the industrial sector, there is often a focus on direct energy-economic gains and not on the indirect gains. This means that comfort aspects such as good ventilation, ergonomic light and aesthetically pleasing environmental design are not prioritized. Today's industries often have varied flexible layouts to optimize their processes. That is, workstations, machines and storage shelves are moved to favor the flow of specific products. If the layout is varied, the lighting can be adversely affected if it is permanently mounted. Through a benchmarking study and light calculations, it was investigated to what extent a fixed lighting installation might be suitable for an industry with varying flow. The result of a part of the study shows that a fixed lighting installation, where the luminaires have wide diffusion angle, work well in industrial operations with varying flow rates. A quantitative study of 17 participants was conducted in an industrial room to investigate the extent to which well-being is affected in an industry of good light quality, compared with a poorer light quality facility. The study was conducted for four weeks by evaluating two lighting installations. The system's existing lighting installation was compared with a lighting installation of better technology and light quality. In this part of the survey it was found that the light of the higher light quality perceived more natural, more focused, warmer and more comfortable than in the light with lower light quality. Other aspects, such as shadowing and reflection, were experienced relatively similar throughout the extent of the research. By establishing LCC calculations and calculating LENI numbers, it could be determined how the energy cost of the plant is affected by a new lighting system with LED. A light facility with the new technology has a lower energy consumption than the older installation. This contributes to a more economic and environmental sustainability.

  • 32.
    Hild, Florian-Pascal
    Jönköping University, School of Engineering.
    Exploring Behavioral Driven Development2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Behavior Driven Development (BDD) is a modern agile software development approach that originates from Test Driven Development (TDD) and Acceptance Test Driven Development (ATDD). Other than TDD and ATDD, BDD introduces new methods and strategies that intend to discover the behavior of software in greater detail which is achieved through enhanced communication and cooperation between everyone involved in software projects. In this paper it is examined how BDD can be taken even further and be connected to the products of UX-strategy in order to explore the possibilities to improve internal communication within software project teams. The report guides the reader through the theoretical frameworks of BDD, UX-strategy and Communication and presents suggestions of how BDD and the products UX-strategy can be connected to improve communication and understanding.

  • 33.
    Holsmark, Rickard
    et al.
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Kumar, Shashi
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Palesi, Maurizio
    DIIT,University of Catania, Italy.
    A Multi-Level Routing Scheme and Router Architecture to support Hierarchical Routing in Large Network on Chip Platforms2010In: 4th Workshop on Highly Parallel Processing on a Chip (HPPC 2010), 2010Conference paper (Refereed)
    Abstract [en]

    The concept of hierarchical networks is useful for designing a large heterogeneous NoC by reusing predesigned small NoCs as subnets. It can also be helpful when analyzing and designing a large NoC as interconnection of subnets at a higher level of abstraction. Hierarchical deadlock-free routing is required to enable deadlock-free interconnection of sub-networks with different internal routing algorithms. In this paper we show that multi-level addressing is a cost-effective implementation option for hierarchical deadlock-free routing. We propose a two-level routing scheme, which is not only efficient, but also  enables co-existence of algorithmic and table-based implementation in one router. A hierarchical view of the network simplifies addressing of network nodes and address decoding in the router. Synthesis results show that a 2-level hierarchical router design for an 8x8 NoC, can reduce area and power requirements by  up to ~20%, as compared to a router for the flat network. This work also proposes a new possibility for increasing the number of nodes available for subnet-to-subnet interfaces, while keeping the properties of hierarchical deadlock-freedom. We evaluate and discuss the communication performance in a 2-level hierarchical network for various subnet interface set-ups and traffic situations. A cycle accurate simulator has been developed and used for this purpose.

  • 34.
    Holsmark, Rickard
    et al.
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering. Jönköping University, School of Engineering, JTH. Research area Robust Embedded Systems.
    kumar, Shashi
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering. Jönköping University, School of Engineering, JTH. Research area Robust Embedded Systems.
    Palesi, Maurizio
    University of Catania, Italy.
    Mejia, Andres
    Technical University of Valencia, Spain.
    HiRA: A methodology for deadlock free routing in hierarchical networks on chip2009In: Networks-on-Chip, 2009. NoCS 2009. 3rd ACM/IEEE International Symposium on, IEEE Computer Society , 2009, p. 2-11Conference paper (Refereed)
    Abstract [en]

    Complexity of designing large and complex NoCs can be reduced/managed by using the concept of hierarchical networks. In this paper, we propose a methodology for design of deadlock free routing algorithms for hierarchical networks, by combining routing algorithms of component subnets. Specifically, our methodology ensures reachability and deadlock freedom for the complete network if routing algorithms for subnets are deadlock free. We evaluate and compare the performance of hierarchical routing algorithms designed using our methodology with routing algorithms for corresponding flat networks. We show that hierarchical routing, combining best routing algorithm for each subnet, has a potential for providing better performance than using any single routing algorithm. This is observed for both synthetic as well as traffic from real applications. We also demonstrate, by measuring jitter in throughput, that hierarchical routing algorithms leads to smoother flow of network traffic. A router architecture that supports scalable table-based routing is briefly outlined.

  • 35.
    Ippoliti, Elena
    et al.
    Sapienza University of Rome.
    Moscati, Annika
    Sapienza University of Rome.
    Interfacce di accesso alle informazioni: tra 3D, 3D-GIS e Web GIS2010In: Sistemi informativi integrati per la tutela, la conservazione e la valorizzazione del patrimonio architettonico e urbano / [ed] S. Brusaporci, Rome: Gangemi Editore , 2010Chapter in book (Other academic)
  • 36.
    Ivanic, Boris
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Användning av accelerometrar för detektering av rörelse i Husqvarna ABs gräsklippare Automower2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    In order to detect movements and vibrations on different appliance, especially robots and self-going devices are used different sensors. One of the most used movement sensors are accelerometers. They are three different types of accelerometers one-axes, two-axes and three-axes. They can be analogue or digital. Husqvarna AB uses an accelerometer to detect movements of their self-going lawnmower Automower. Since it begins to turn up others sensors on the market and the sensor which today uses in Husqvarna’s lawnmower don’t fulfils all functions there is a need to find other solutions. What sensors can be found on a market and which new has come? How can they be used best and which difference is between them? How can they use to detect movements in x, y and z direction and how can they read different movements to detect collision, inclination and lift? Sensor analysis will be done to find out how they can be used in this matter and an big analysis will be done to find out how a sensor witch already is in a lawnmower can be use on the better ways?

  • 37.
    Jia, Baolong
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Development of Graphical User Interface and Data Acquisition System for Home Healthcare Using Tinyos-2.x Sensor Networks2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Wireless sensor network (WSN) is an very important technology that is able to realize a vision of ambient intelligence. One of the application of Wireless Sensor Networks is Wireless E-Care Systems for monitoring the health of senior citizens. The idea is to use simple sensors that distributed in the old man/woman ’s outfit and home to provide home assistant/ nurse/ healthcare center/ relatives with a degree of ”understanding” of what he is doing, where he is, what is his health and activity state, what help he need, and what is happening around him.

     

    Basically wireless sensor network consist of three parts: WSN, gateway and remote health-care centre. The purpose of this thesis is to develop a Graphical User Interface and Data Acquisition System for Home Health Care Using Tinyos-2.x Sensor Networks. This system is used for remote health-care centre.

     

    This thesis presents design and implementation of a prototype of a system, which includes the following functions, collecting real-time data from tinyos-2.x sensor networks to a database; displaying nodes’ topology and deployment map at home in real time; plotting sampling values versus time in real time and replay time. dissemination parameters or commands to sensor networks.

     

    Results of the experiments show this system is working well and reliable.

  • 38.
    Johansson, Alf
    et al.
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Shen, Wei
    Mid Sweden University, Information Technology and Media.
    Xu, Youzhi
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    An ANT based Wireless Body Sensor Biofeedback Network for Medical E-Health Care2011In: Proceeedings of the 7th International Conference on Wireless Communication Networking and Mobile Computing: Volume 4. Network Performance, Security and Applications. Mobile Computing Systems, IEEE , 2011Conference paper (Refereed)
    Abstract [en]

    This paper presents an ultra low power wireless insole sensor biofeedback and gait analysis system for rehabilitation of balance control for post stroke patients and gait related rehabilitation. The system integrates ANT wireless protocol, a wireless home E-health care sensor network and open-source mobile devices technology. The paper also presents methods to time synchronize the two sole sensors. The system has been evaluated and it shows good performance in power consumption, communication latency and coexistence with WiFi/Bluetooth/GSM.

  • 39.
    Johansson, Joel
    Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Product Development - Computer supported engineering design.
    A Feature and Script Based Integration of CAD and FEA to Support Design of Variant Rich Products2014In: Computer-Aided Design and Applications, ISSN 1686-4360, Vol. 11, no 5, p. 552-559Article in journal (Refereed)
    Abstract [en]

    The focus of the research presented in this article has been an integration of a CAD-system and a FEA pre-processor to automatically develop a complete FEA-models in order to make simulation based design possible. The article presents a prototype system that was developed to automate the simulation of the behavior of ski-racks mounted on cars during collision. This type of simulations requires mesh models containing structured mesh, an issue solved in the presented system and that is presented in the article. It is also shown how to make it possible to introduce contacts, loads, constraints, and other FEM-properties based on CAD-geometry.

  • 40.
    Jönsson, Tim
    Jönköping University, School of Engineering, JTH. Research area Information Engineering. Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Efficiency determination of automated techniques for GUI testing2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Efficiency as a term in software testing is, in the research community, a term that is not so well defined. In the industry, and specifically the test tool industry, it has become a sales pitch without meaning.

    GUI testing in its manual form is a time consuming task, which can be thought of as repetitive and tedious by testers. Using human testers to perform a task, where focus is hard to keep, often ends in defects going unnoticed.

    The purpose of this thesis is to collect knowledge on the area efficiency in software testing, but focusing more on efficiency in GUI testing in order to keep the scope focused. Part of the purpose is also to test the hypothesis that automated GUI testing is more efficient than traditional, manual GUI testing.

    In order to reach the purpose, the choice fell to use case study research as the main research method. Through the case study, a theoretical study was performed to gain knowledge on the subject. To gain data used for an analysis in the case study, the choice fell on using a semi-experimental research approach where one automated GUI testing technique called Capture & Replay was tested against a more traditional approach towards GUI testing.

    The results obtained throughout the case study gives a definition on efficiency in software testing, as well as three measurements on efficiency, those being defect detection, repeatability of test cases, and time spent with human interaction. The result also includes the findings from the semi-experimental research approach where the testing tools Squish, and TestComplete, where used beside a manual testing approach.

    The main conclusion deducted in this work is that an automated approach towards GUI testing can become more efficient than a manual approach, in the long run. This is when efficiency is determined on the points of defect detection, repeatability, and time.

  • 41.
    Karim, Mokhalad
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    MÄTUTRUSTNING OCH METODIK FÖR MÄTNING AV ENERGIFÖRBRUKNING PÅ BATTERIDRIVNA STRÖMSNÅLA APPARATER2009Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta examensarbete har utförts på Saab Training Systems (STS) AB i Huskvarna. Arbetet handlar om metodik och utrustning för mätning av ström och energiförbrukning på Saabs batteridrivna apparater, nämligen SAT och SAAD.

    Nuvarande mätutrustning klarar inte av de tekniska kraven som STS ställer. Därför behövs det ett instrument eller en metod som generellt kan mäta energiförbrukningen på Saabs batteridrivna enheter. Problemet är att strömmen till apparaterna varierar kraftigt från några mikroampere till flera hundra milliampere i en väldigt kort tidsperiod.

    Arbetet har genomförts som en teoretisk utredning men innehåller också praktiska mätningar på Saabs SAT och SAAD för att undersöka vilka svårigheter som kan uppstå vid mätning. Dessutom har två förslag på lösningar presenterats. Det mest lovande av förslagen är baserat på en logaritmisk förstärkare. Detta förslag har även verifierats praktiskt med ett testkort (prototyp).

    Testkretskortet kan delas upp i två delar. Den första delen innehåller en linjär förstärkare som känner av strömmen som går igenom en avkänningsresistor. Test av den delen av kortet visade att den fungerade enligt specifikationen, och det var att förstärka signalen med den förstärkningsfaktor som bestämts och att kunna mäta med oscilloskop på plussidan av testobjektet.

    Den andra delen innehåller en logaritmisk förstärkare som komprimerar stordynamiksignaler. Test av denna del av kortet visade att förstärkaren var olämplig för ändamålet, eftersom den inte klarade av att förstärka små signaler.

    Idén att använda logaritmisk förstärkare är dock ett bra alternativ, givet att en lämplig förstärkare används.

  • 42.
    Karlsson, Eric
    et al.
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Nyström, Simon
    Jönköping University, School of Engineering, JTH, Civil Engineeering and Lighting Science.
    Upplevelsen av flimmer från ljusreglerade filament LED-ljuskällor2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study has been carried out in the form of a survey with 25 respondents. The work has aimedto give professionals and individuals an indication of how people perceive the light from phasedimmedLED light sources in private homes. The study has investigated two issues regardingthe human experience of flicker, and how sensitive human beings are to flicker from a phasedimmedLED light source before it will be perceived as inconvenient. Scientific literature hasbeen reviewed to gain an understanding and deeper knowledge about the impact of flicker onhuman health, and which guidelines and possible approaches there are to solve the problem. Asurvey has been developed to find out if flicker is perceived by humans, and how the perceptionof inconvenience is experienced. The study found out that people perceive flicker differently,despite measured frequencies above 90 Hertz (Hz). Through data from digital measurementsand acquired empirical evidence from the study’s results, it is not only the frequency level thataffects humans perception of flicker, but also the percentage of light emitted from the lightsource. A correlation between perceived inconvenience and flicker can be noted, but notdetermined as a clear result. The work was limited by only investigating a small population ofrespondents over a short period of time.

  • 43.
    Karlsson, Mattias
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    IMPLEMENTATION OF ALGORITHMS ON FPGAS2009Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis describes how an algorithm is transferred from a digital signal processor to an embedded microprocessor in an FPGA using C to hardware program from Altera.

    Saab Avitronics develops the secondary high lift control system for the Boeing 787 aircraft. The high lift system consists of electric motors controlling the trailing edge wing flaps and the leading edge wing slats. The high lift motors manage to control the Boeing 787 aircraft with full power even if half of each motor’s stators are damaged. The motor is a PMDC brushless motor which is controlled by an advanced algorithm. The algorithm needs to be calculated by a fast special digital signal processor.

    In this thesis I have tested if the algorithm can be transferred to an FPGA and still manage the time and safety demands. This was done by transferring an already working algorithm from the digital signal processor to an FPGA. The idea was to put the algorithm in an embedded NIOS II microprocessor and speed up the bottlenecks with Altera’s C to hardware program.

    The study shows that the C-code needs to be optimized for C to hardware to manage the up speeding part, as the tests showed that the calculation time for the algorithm actually became longer with C to hardware. This thesis also shows that it is highly probable to use an FPGA equipped with Altera’s NIOS II safety critical microprocessor instead of a digital signal processor to control the electrical high lift motors in the Boeing 787 aircraft.

  • 44.
    Khademhosseinieh, Banafsheh
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Efficiency as an Aspect of Quality: In the Way of Developing a Method for Evaluating Efficiency of Enterprise Modeling Methods2012In: Perspectives in Business Informatics Research / [ed] Natalya Aseeva, Eduard Babkin, Oleg Kozyerv, Springer, 2012, p. 200-210Conference paper (Refereed)
    Abstract [en]

    All organizations aim at making progress in their carrier. Therefore, they should have a clear image about the current (AS-IS) and the desired state (TO-BE); and based on that figure out the actions they should follow for moving from AS-IS to TO-BE state. Enterprise Modeling (EM) is a support for this purpose and requires applying the proper tool, i.e. an Enterprise Modeling Method (EMM). However, this application process requires to be efficient. This means the intended results (models) should be achieved, whilst the resources are used in a worthwhile way. This paper concentrates on how to conduct an efficient EMM application process. The foundational idea behind this research is that if behavior of an EMM (and its different parts) is foreseeable, the results will be closer to the stakeholders’ preferences and the resources will be used in a more worthwhile way.

  • 45.
    Khademhosseinieh, Banafsheh
    et al.
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Seigerroth, Ulf
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Towards Evaluating Efficiency of Enterprise Modeling Methods2012In: Information and Software Technologie: 18th International Conference, ICIST 2012 Kaunas Lithuania, September 13-14, 2012 Proceedings / [ed] Tomas Skersys, Rimantas Butleris, Rita Butkiene, Springer Berlin/Heidelberg, 2012, p. 74-86Conference paper (Refereed)
    Abstract [en]

    Each organization should make progress to remain competent in its business. Enterprise Modeling (EM) helps in understanding the current and planning the future states, followed by proposing improvement actions in an enterprise. To receive support from EM, we should start a process of using an Enterprise Modeling Method (EMM), that likewise any other process needs using resources. As resources are expensive, we prefer not only gaining results, rather using resources reasonably, i.e. performing an efficient process that supports the process quality. To realize if we have an efficient EMM, we should evaluate its efficiency. In this paper we present a method for efficiency evaluation of EMMs for general case of application. This method contains efficiency criteria and questions for evaluating their fulfillment. Then it is applied to the Enterprise Knowledge Development for appraising the evaluation method. The paper ends with a number of conclusions about the evaluation method.

  • 46.
    Koneri, Deepak Kumar
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Optimization of PCB Heater Heating Profile for Power-Efficient Humidity Management in Electronics Enclosures2011Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this master thesis, automated optimization simulation laboratory is developed and implemented for power-efficient humidity management. A concept of local heating as a humidity management measure in electronics enclosure in severe environmental conditions has been evaluated. Environmental conditions included an instant change of the temperature from 0o C to 24o C and relative humidity 30% to 95%. Evaluation process has been developed as an optimization problem solved by integrating CFD modeling and excel data sheet calculations into the automation simulation workflow environment. Heating profile vector has been defined as design variable and optimized objective was defined as the difference between surface temperature of heated IC package and local dew point temperature. The task included interfacing between floTHERM and OPTIMUS tools, sensitivity analysis and CFD model simplification in order to obtain time efficient simulation models subsequently used in optimization process. Ultimate goal in the optimization was to obtain a power efficient heating profile for the local heater that keeps local relative humidity at low level thereby minimizing moisture induced electronic reliability problems.

  • 47.
    Koç, Hasan
    et al.
    University of Rostock.
    Lantow, Birger
    University of Rostock.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    Experiences from Ontology Development for Service Innovation in Transportation Industries2015In: Joint Proceedings of the BIR 2015 Workshops and Doctoral Consortium co-located with 14th International Conference on Perspectives in Business Informatics Research (BIR 2015), Tartu, Estonia, August 26-28, 2015, CEUR-WS , 2015, Vol. 1420, p. 136-147Conference paper (Refereed)
    Abstract [en]

    Many industries experienced a shift in sourcing and logistics strategies, the industrial demand for more dynamic logistics solutions with adequate IT support is increasing. Due to advances in wireless sensor networks and technologies, the transportation area in logistics industry is the most promising application field for new types of innovative services. The emerging applications in this field require an integrated knowledge base to provide enhanced customer services. The aforementioned trends will lead to service innovation if the adaptation of business models is ensured. Our earlier work focused on adaptable business models [1] and argued that knowledge representation techniques are suitable concepts to improve selforganization [2]. In this paper we introduce the core component of the knowledge architecture represented as ontologies and report experiences from the development process. The contributions of this paper are (a) a detailed description of the ontology construction process based on a realworld scenario, (b) experiences from the development process and, (c) proposed adaptations of an established ontology engineering approach.

  • 48.
    Koç, Hasan
    et al.
    University of Rostock.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    A Business Process Based Method for Capability Modelling2015In: Perspectives in Business Informatics Research - 14th International Conference, BIR 2015, Tartu, Estonia, August 26-28, 2015. / [ed] Matulevičius, Raimundas, Dumas, Marlon, Springer, 2015, Vol. 229, p. 257-264Conference paper (Refereed)
  • 49.
    Koç, Hasan
    et al.
    University of Rostock.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    From Business Process Models to Capability Models2015In: 45. Jahrestagung der Gesellschaft für Informatik, Informatik 2015, Informatik, Energie und Umwelt, Cottbus, Deutschland, 28. September - 2. Oktober 2015., Bonn: Gesellschaft für Informatik, 2015, Vol. 246, p. 979-992Conference paper (Refereed)
  • 50.
    Kvist, Johan
    Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering.
    Security and Control System for fluid in a tank2007Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    This rapport describes how a security and control system has been developed for moveable diesel tanks. Enormous amounts of diesel in Sweden are stolen every year and the tank that is most vulnerable is the moveable tank in other words tanks that can be moved around with diesel inside.

    The report proposes methods how to measure fluid amount in a tank and how to measure if diesel is disappearing from the tank.

    The report also describes a tank monitoring system prototype.

123 1 - 50 of 117
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